;;; -*- lexical-binding: t -*-
;;
;; this file:
;;   https://dataswamp.org/~incal/emacs-init/gnus/summary.el

(require 'dwim)
(require 'gnus-msg)
(require 'gnus-score)
(require 'gnus-sum)
(require 'group-summary)
(require 'mode-line)
(require 'scroll)
(require 'super)

(setq gnus-auto-select-first          t)
(setq gnus-confirm-mail-reply-to-news nil)
(setq gnus-ignored-from-addresses     user-mail-address)
(setq gnus-summary-line-format        "%*%U%3{%R%} %I%0{%f%} %4{%s%}\n")
(setq gnus-summary-mode-line-format   "%G")

(setq gnus-summary-thread-gathering-function
      #'gnus-gather-threads-by-references)

(defun gnus-summary-respool-all (&optional beg end)
  (interactive (use-region))
  (or beg (setq beg (point-min)))
  (or end (setq end (point-max)))
  (let ((lines  (count-lines beg end))
        (method (gnus-find-method-for-group "nnml:mail.misc")) )
    (goto-char beg)
    (gnus-summary-respool-article lines method) ))

(defun gnus-summary-insert-all (&rest _)
  (gnus-summary-insert-old-articles t) )
(advice-add       #'gnus-summary-limit-to-subject :before #'gnus-summary-insert-all)
(advice-add       #'gnus-summary-limit-to-author  :before #'gnus-summary-insert-all)
;; (advice-remove #'gnus-summary-limit-to-subject         #'gnus-summary-insert-all)
;; (advice-remove #'gnus-summary-limit-to-author          #'gnus-summary-insert-all)

(defun gnus-summary-exit-and-update-group ()
  (interactive)
  (kill-buffer)
  (gnus-summary-save-newsrc)
  (gnus-switch-to-group-buffer) )

(defun gnus-summary-mark (mark beg end)
  (interactive
   (let ((m (read-char "mark: ")))
     (if (use-region-p)
         (list m (region-beginning) (region-end))
       (let*((bg (point))
             (ed (1+ bg)) )
         (list m bg ed) ))))
  (goto-char beg)
  (beginning-of-line)
  (while (< (point) end)
    (gnus-summary-mark-article (gnus-summary-article-number) mark)
    (gnus-summary-find-next) ))

;; (setq gnus-summary-prepared-hook nil)
(defun gnus-summary-prepared-hook-f ()
  (goto-char (point-max))
  (forward-line -1) )
(setq gnus-summary-prepared-hook #'gnus-summary-prepared-hook-f)

(defun gnus-summary-set-keys ()
  (let ((kmap gnus-summary-mode-map))
    (disable-super-global-keys kmap)
    (set-vertical-keys         kmap)

    ;; group
    (keymap-set kmap "o" #'gnus-summary-insert-old-articles)
    (keymap-set kmap "w" #'gnus-summary-exit-and-update-group)

    ;; reply
    (keymap-set kmap "r" #'gnus-summary-followup-with-original)
    (keymap-set kmap "R" #'gnus-summary-reply-with-original)

    ;; message
    (keymap-set kmap "f"   #'gnus-article-fill-cited-article)
    (keymap-set kmap "F"   (lambda () (interactive) (gnus-summary-mail-forward 4)))
    (keymap-set kmap "z"   #'gnus-score-edit-current-scores)
    (keymap-set kmap "RET" #'gnus-summary-show-article)

    ;; mark
    (keymap-set kmap "l" #'gnus-summary-put-mark-as-unread-next)
    (keymap-set kmap "s" #'gnus-summary-mark-as-read-forward) ))

(defun gnus-summary-mode-hook-f ()
  (lines)
  (gnus-summary-set-keys) )
(add-hook 'gnus-summary-mode-hook #'gnus-summary-mode-hook-f)

(provide 'summary)